diff --git a/requirements-tests-py3.txt b/requirements-tests-py3.txt
index 401f26cb9..7364fc6bc 100644
--- a/requirements-tests-py3.txt
+++ b/requirements-tests-py3.txt
@@ -8,3 +8,6 @@ flake8-bugbear==20.1.4
 flake8-pyi==20.10.0
 isort==5.5.3
 pytype>=2021.4.1
+
+# workaround for https://github.com/google/pytype/issues/909
+attrs==20.3.0